21910374 has 24 divisors (see below), whose sum is σ = 47728512. Its totient is φ = 7264080.

The previous prime is 21910373. The next prime is 21910391. The reversal of 21910374 is 47301912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21910373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252 + ... + 6624.

It is an arithmetic number, because the mean of its divisors is an integer number (1988688).

Almost surely, 2^21910374 is an apocalyptic number.

21910374 is an abundant number, since it is smaller than the sum of its proper divisors (25818138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21910374 is a wasteful number, since it uses less digits than its factorization.

21910374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6572 (or 6569 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 21910374 is about 4680.8518455512. The cubic root of 21910374 is about 279.8229067239.

The spelling of 21910374 in words is "twenty-one million, nine hundred ten thousand, three hundred seventy-four".